v3.26.1
Derivatives (Schedule of Effect on Operating Results) (Details) - Commodity Derivatives - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income (Loss) $ (653) $ 915 $ (8,224) $ 545
Contracts designated as hedges under accounting guidance | Onshore transportation and services product costs        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income (Loss) 195 1,370 (5,916) 1,087
Contracts not considered hedges under accounting guidance | Onshore transportation and services product costs; Offshore transportation operating costs        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income (Loss) $ (848) $ (455) $ (2,308) $ (542)